Dc power distribution system

Abstract

A DC power distribution system is equipped with a storage device having a first storage battery, which discharges to electrical apparatuses only during power failure, and a second storage battery, which discharges to electrical apparatuses when service is not interrupted. The electricity storage device and electrical apparatuses are supplied with DC power from a power generation device which generates electricity using natural energy, and DC power which has been converted from AC power supplied from a commercial power source. When the power supply from the electricity generation device and the commercial power source is interrupted, the first storage battery discharges power to the electrical apparatuses.

1 . A DC power distribution system comprising:
 a storage device,   wherein the storage device includes a first storage battery which is discharged to supply a power to an electric device only in a power failure, and a second storage battery which is discharged to supply a power to the electric device in a normal mode.   
     
     
         2 . The DC power distribution system of  claim 1 , wherein the storage device and the electric device are supplied with a DC power from a power generation device which generates power using natural energy and a DC power which has been converted from an AC power supplied from a commercial power source, and
 wherein the first storage battery is discharged to supply a power to the electric device when the power supply from the power generation device and the commercial power source is interrupted.   
     
     
         3 . The DC power distribution system of  claim 2 , further comprising a controller for controlling charging and discharging of the first and second storage batteries,
 wherein the controller switches roles of the first and second storage batteries at a predetermined timing.   
     
     
         4 . The DC power distribution system of  claim 2 , wherein at least one of the first and second storage batteries is accommodated under a floor of a building. 
     
     
         5 . The DC power distribution system of  claim 2 , further comprising a setting unit which sets roles of the first and second storage batteries to a role for the power failure or a role for the normal mode through manual operation. 
     
     
         6 . The DC power distribution system of  claim 5 , wherein each of the first and second storage batteries is provided as a battery set including a plurality of single batteries, and
 wherein the setting unit sets respective roles of the single batteries included in the first and second storage batteries to a role for the power failure or a role for the normal mode through manual operation.   
     
     
         7 . The DC power distribution system of  claim 2 , wherein the power generation device is a solar cell which generates power using sun light as the natural energy. 
     
     
         8 . The DC power distribution system of  claim 3 , wherein at least one of the first and second storage batteries is accommodated under a floor of a building. 
     
     
         9 . The DC power distribution system of  claim 3 , further comprising a setting unit which sets roles of the first and second storage batteries to a role for the power failure or a role for the normal mode through manual operation. 
     
     
         10 . The DC power distribution system of  claim 4 , further comprising a setting unit which sets roles of the first and second storage batteries to a role for the power failure or a role for the normal mode through manual operation. 
     
     
         11 . The DC power distribution system of  claim 8 , further comprising a setting unit which sets roles of the first and second storage batteries to a role for the power failure or a role for the normal mode through manual operation. 
     
     
         12 . The DC power distribution system of  claim 9 , wherein each of the first and second storage batteries is provided as a battery set including a plurality of single batteries, and
 wherein the setting unit sets respective roles of the single batteries included in the first and second storage batteries to a role for the power failure or a role for the normal mode through manual operation.   
     
     
         13 . The DC power distribution system of  claim 10 , wherein each of the first and second storage batteries is provided as a battery set including a plurality of single batteries, and
 wherein the setting unit sets respective roles of the single batteries included in the first and second storage batteries to a role for the power failure or a role for the normal mode through manual operation.   
     
     
         14 . The DC power distribution system of  claim 11 , wherein each of the first and second storage batteries is provided as a battery set including a plurality of single batteries, and
 wherein the setting unit sets respective roles of the single batteries included in the first and second storage batteries to a role for the power failure or a role for the normal mode through manual operation.   
     
     
         15 . The DC power distribution system of  claim 14 , wherein the power generation device is a solar cell which generates power using sun light as the natural energy.